266040 has 48 divisors (see below), whose sum is σ = 865800. Its totient is φ = 70848.

The previous prime is 266029. The next prime is 266047. The reversal of 266040 is 40662.

266040 is a `hidden beast` number, since 2 + 660 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10 + ... + 729.

2²⁶⁶⁰⁴⁰ is an apocalyptic number.

266040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432900).

266040 is an abundant number, since it is smaller than the sum of its proper divisors (599760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266040 is a wasteful number, since it uses less digits than its factorization.

266040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 266040 is about 515.7906552081. The cubic root of 266040 is about 64.3154994252.

The spelling of 266040 in words is "two hundred sixty-six thousand, forty".